You can find a same file like "system" in another computer which has windows OS or try to find on internet. If you have any windows cd, it is easier (in cd's directory or in *.cab). Cause you use...

Could you be more clear at "copy c:\windows\repair\system c:\windows\system32\config\system wasnt able to be copied at the end". I mean the message of command. Try to copy the same file from another...

It looks like a problem with boot file of windows. Try it in "safe mode" or "last know good successful ..." :
press F8 during reboot process, you will see it

Try to use some edit program in dos...

Hi there! Bl had same problems and this is my experience:
It caused by a kind of viruses, so you must remove this problem first by some third program (norton anti virus for ex).
After then you can...